package com.guojing.lenovo.game2048;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Point;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.GridLayout;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by lenovo on 2015/9/28.
 */
public class GameView extends GridLayout{
    public GameView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initGameView();
    }
    public GameView(Context context) {
        super(context);
        initGameView();

    }
    public GameView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initGameView();

    }
    private void initGameView(){

        setColumnCount(4);
        setBackgroundColor(0xffbbada0);
        setOnTouchListener(new OnTouchListener() {

            private float startX, startY, offsetX, offsetY;

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        startX = event.getX();
                        startY = event.getY();
                        break;
                    case MotionEvent.ACTION_UP:
                        offsetX = event.getX() - startX;
                        offsetY = event.getY() - startY;

                        if (Math.abs(offsetX) > Math.abs(offsetY)) {
                            if (offsetX < -5) {
                                swipeLeft();
                            } else if (offsetX > 5) {
                                swipeRight();
                            }
                        } else {
                            if (offsetY < -5) {
                                swipeUp();
                            } else if (offsetY > 5) {
                                swipeDown();
                            }
                        }

                        break;

                }
                return true;
            }
        });
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        int cardWidth=(Math.min(w,h)-10)/4;
        addCards(cardWidth, cardWidth);
        startGame();
    }
    private void addCards(int cardWith,int cardHeight){
        Card c;
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++){
                c=new Card(getContext());
                c.setNum(0);
                addView(c,cardWith,cardHeight);

                cardsMap[x][y]=c;
            }
        }

    }
    private void startGame(){
        MainActivity.getMainActivity().clearScore();
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++){
                cardsMap[x][y].setNum(0);
            }
        }
        addRandomNum();
        addRandomNum();

    }
    private void addRandomNum(){

        emptyPoints.clear();

        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++){
                if (cardsMap[x][y].getNum()<=0){
                    emptyPoints.add(new Point(x,y));
                }
            }
        }
        Point p=emptyPoints.remove((int)(Math.random()*emptyPoints.size()));
        cardsMap[p.x][p.y].setNum(Math.random() > 0.1 ? 2 : 4);
    }

    private void swipeLeft(){
        boolean merge=false;
        for(int y=0;y<4;y++){
            for(int x=0;x<4;x++) {
                for(int x1=x+1;x1<4;x1++){
                    if(cardsMap[x1][y].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x1][y].getNum());
                            cardsMap[x1][y].setNum(0);
                            x--;
                            merge=true;
                        }else if(cardsMap[x][y].equals(cardsMap[x1][y])){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x1][y].setNum(0);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;
                        }
                        break;
                    }
                }

            }
        }
        if(merge){
            addRandomNum();
            checkComplete();
        }

    }
    private void swipeRight(){

        boolean merge=false;

        for(int y=0;y<4;y++){
            for(int x=3;x>=0;x--) {
                for(int x1=x-1;x1>=0;x1--){
                    if(cardsMap[x1][y].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x1][y].getNum());
                            cardsMap[x1][y].setNum(0);
                            x++;
                            merge=true;
                        }else if(cardsMap[x][y].equals(cardsMap[x1][y])){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x1][y].setNum(0);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;
                    }
                }

            }
        }
        if(merge){
            addRandomNum();
            checkComplete();

        }
    }
    private void swipeUp(){

        boolean merge=false;

        for(int x=0;x<4;x++){
            for(int y=0;y<4;y++) {
                for(int y1=y+1;y1<4;y1++){
                    if(cardsMap[x][y1].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x][y1].getNum());
                            cardsMap[x][y1].setNum(0);
                            y--;
                            merge=true;
                        }else if(cardsMap[x][y].equals(cardsMap[y1][x])){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x][y1].setNum(0);

                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;
                    }
                }

            }
        }
        if(merge){
            addRandomNum();
            checkComplete();

        }
    }
    private void swipeDown(){

        boolean merge=false;

        for(int x=0;x<4;x++){
            for(int y=3;y>=0;y--) {

                for(int y1=y-1;y1>=0;y1--){
                    if(cardsMap[x][y1].getNum()>0){
                        if(cardsMap[x][y].getNum()<=0){
                            cardsMap[x][y].setNum(cardsMap[x][y1].getNum());
                            cardsMap[x][y1].setNum(0);
                            y++;
                            merge=true;
                        }else if(cardsMap[x][y].equals(cardsMap[x][y1])){
                            cardsMap[x][y].setNum(cardsMap[x][y].getNum()*2);
                            cardsMap[x][y1].setNum(0);
                            MainActivity.getMainActivity().addScore(cardsMap[x][y].getNum());
                            merge=true;

                        }
                        break;
                    }
                }

            }
        }
        if(merge){
            addRandomNum();
            checkComplete();

        }
    }
    private void checkComplete(){

        boolean complete=true;

        ALL:
        for (int y=0;y<4;y++) {
            for (int x = 0; x < 4; x++) {
                if (cardsMap[x][y].getNum() == 0 ||
                        (x > 1 && cardsMap[x][y].equals(cardsMap[x - 1][y])) ||
                        (x < 3 && cardsMap[x][y].equals(cardsMap[x + 1][y])) ||
                        (y > 0 && cardsMap[x][y].equals(cardsMap[x][y - 1])) ||
                        (y < 3 && cardsMap[x][y].equals(cardsMap[x][y + 1]))) {
                    complete = false;
                    break ALL;
                }
            }
        }
        if(complete){
            new AlertDialog.Builder(getContext()).setTitle("你好").setMessage("游戏结束").setPositiveButton("重来", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {

                    startGame();
                }
            }).show();
        }

    }

    private Card[][] cardsMap=new Card[4][4];
    private List<Point>emptyPoints=new ArrayList<Point>();
}
